My machine is Toshiba Satellite L300 it hard a problem of restarting at first and i changed BIOS settings to compatibility mode and put in a bootable XP system software Cd.in order to uninstall the previous software. i formatted it but it got to a place and gave me a blue blank screen with no error message. i later changed BIOS to the other mode and placed vista back but it wount install software to complition ive tried many system softwares xp ,vista win 7 but it still installs to some point and gives me a blank screen what do you advice me to do?

thanks.

grace.